查询词典 computation

After the analysis of the algorithms model of MPEG-2 AAC, the thesis optimizes some blocks with great computation of Psychoacoustic Model, Filter banks and Quantization coding, etc. It omits some function blocks which have much computation and avail little to the gain of coding, for example, prediction in time domain, TNS, etc. It also adopts some fast algorithms to reconstruct some model for the reason of real time characteristic.

在对 MPEG-2 AAC算法模型进行分析之后，对心理声学模型，滤波器组和量化编码模块等计算量较大的模块进行优化，同时也省略了部分运算量大但对编码效果增益不明显的几个模块，如时域预测和 TNS 等，并使用了一些快速计算技术对算法模型进行实时化改造。

With respect to the exponential computation complexity of the optimal multi-user detection in CDMA systems,a sub-optimal multi-user detector based on evolution strategy for exonerating crossover operation and lowing computation complexity is proposed.

1引言CDMA通信及其关键技术是目前国内外移动通信研究的热点，但是CDMA通信系统中存在着固有的多址干扰，极大地限制了多址用户数或同样用户数条件下的通信质量。

I made 'natural sciencedictionary' which is edited in chief by Zhenhuan JIANG ( superscribed by Jiaxi LU,preluded by Sanqiang QIAN ) as my source of statistics and adopt the researchmethod of statistic computation. As a result of my research, I get aggregatedeveloping time series analysis of technological sciences and time series analysis offour-layer technological sciences. Then, I combine statistic computation with historyreview. After category definition and corroboration about technological sciences isestablished integrally and accurately.

根据刘启华教授主持的国家社会科学基金项目&技术科学的范畴界定、历史分期与发展模式研究&中设计的研究思路，本文以姜振寰主编(卢嘉锡题名、钱三强写序)的《自然科学学科辞典》为统计源，采用统计计量的研究方法，分别做出了技术科学总体发展的时间序列分析和四个层次技术科学发展的时间序列分析。

Till now, there has not three-dimensional computation of radiation in system with complex geometry and fulled of inhomegeneous, absorpting and emitting medium existed in our country also. The author carries on three-dimensional computation of radiation in vectored nozzle for the first time, which undoubtedly establishes certain basis in this field.

此前我们国内还没有对复杂形状的系统内，不均匀吸收-发射性气体介质的辐射场的三维数值计算，本文率先对矢量喷管的辐射场进行了三维数值计算，为该领域的研究奠定了一定的基础。

Proocess of design is from parts chosen to related structural arrangement and size computation,and the last one is intensity computation.we can choose steering gear angle ratio reasonably so that we control po -rtably and sensitively.

通过合理的选择角传动比和力传动比来解决操纵轻便性的要求；通过合理的选择后倾角和内倾角、消除转向器传动间隙来满足转向盘和转向轮自动回正和稳定直线行驶要求；通过合理的选择转向系结构和结构布置减小运动干涉。

Used the finite element method computation pipe network resistance thus obtains the ballast water system the line pressure distributed situation. The paper also has carried on the computation to the ballast tank hydraulic loss and has provided the theory basis to the ballast pump optimized design. The overpressure to the ballast tank has been carried on the discussion. The paper also gets the function between the rated flow and the rated pressure of the pump on ships whose BW pipe net is uniform and line is different, which provides a new method for the selection of BW pump.

文章重点讨论了船舶压载水系统的水力计算，使用有限元法计算管网阻力从而得到压载水系统的管路压力分布情况；文章还对压载舱的水力损失进行计算，对压载水泵的优化设计提供了理论依据；文章还对压载水舱过压问题进行讨论；文章对压载水系统相同而航线不同的船舶，利用最小二乘法得到其压载水泵额定流量和额定压头之间的函数关系，为压载水泵的设计和选型提供了新的方法。

First according to the hydraulic pressure elevator system diagram, use the machine design and hydraulic transmission knowledge calculates the diameter of the plunger, cylinder tube wall thickness as well as cylinder bottom thickness; second, through the examination confirmation to the obtained result to complete the work of cylinder design; Simultaneously has carried on the component choice and the computation; Through to the system calorific capacity computation the and the volume of cooling water while the fuel tank cools when needs to complete the hydraulic pressure elevator fuel tank design; Based on the system oil stream condition to calculated the tube internal pressure lose, the local pressure loss as well as the all of the pressure lose to carried on the system checking calculation; Finally through the consult correlation design handbook to calculation and examines the belt, the band pulley, the axis, as well as the key, has completed the hydraulic pressure elevator pumping station transmission system design.

首先根据液压电梯系统原理图，利用机械设计与液压传动等方面的知识计算出柱塞的直径、缸筒的壁厚以及缸底厚度，并对所得结果进行校核验证完成了工作油缸的设计；同时进行了元件的选择和计算；其次，通过系统发热量的计算和油箱冷却时需要的冷却水量的计算完成了液压电梯油箱的设计；依据系统油流状态计算出管内压力损失、局部压力损失以及总压力损失进行了系统的验算；最后通过查阅相关设计手册对带、带轮、轴、以及键进行设计计算和校核，完成了液压电梯的泵站传动系统的设计。

First, the computation theory of the anti-sliding pile has been researched including interaction between the pile and tho landslide, the mechanical model of the pile and the calculation method of the internal force of the pile with prestressed anchor cable. Second, the internal force status, the mechanical computation model and the design method of the foundation beam with prestressed anchor cable have been analyzed. Finally, by the example, engineering instance and the geology mechanical model test, the main results and conclusions deduced from the thesis have been compared and validated.

论文首先对抗滑桩的相关设计计算理论进行了研究，包括抗滑桩与边坡岩土体的相互作用，抗滑桩的力学计算模型以及预应力锚索抗滑桩的内力计算方法；其次对预应力锚索地梁的受力状态、计算模型以及设计方法进行了分析研究：最后结合工程实例和地质力学模型试验对相关结论进行了分析比较、验证。

Using the user-defined model function of PSASP, transient stability computation is carried out and different models of hydraulic system are taken into consideration. The effect of different hydro-turbine and conduit system models on transient stability computation is compared and analyzed.

利用电力系统分析综合程序提供的用户自定义模型接口功能，在多机系统暂态稳定计算中分别计入水力系统不同模型，分析了水轮机和输水系统不同模型对暂态稳定计算结果的影响。

The inference in Credal network is the computation of tight lower and upper bounds for conditional probabilities.A new algorithm for inference in Credal networks is presented based on the framework of bucket elimination.The burden of computation is alleviated by enumerating some of values and the accurate result is obtained.

Credal网络的推理是计算一定证据下的后验概率最大值和最小值，给出了一种Credal网络推理的新方法，该方法是在桶消元框架下通过枚举计算部分因子函数值，使计算量大大减小，并且可以得到精确的结果。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。